Adjustable wrench



W. A-. MARTIN. ADJUSTABLE WRENCH. APPLICATION FILED DEC 10. 1921 Patented July 25, 1922.

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2 SHEETS-SHEET 1.

W. A. MARTIN.

ADJUSTABLE WRENCH.

APPLICATION mp0 05c 10, I921.

Patented July 25, 1922.

2 SHEETS-SHEET 2.

MEN-ma L/ILMflM. fi MEET/N.

' to provide a wrench, in which the gripping warren s'raras' WILLIAM ALEXANDER, MAR-TIN, or

FA'E'EN'E @EWEQEQ COMMERCIAL onoss, rnnvon EDWARD ISLAND,

CANADA.

ADJUSTABLE WRENCH.

arrears To all whom it may concern Be it known that I, @ViLLiAM ALEXANDER- ments in Adjustable Wrenches, of which the following is a specification.

This invention relates to improvements in adjustable wrenches, and has for its 013360138 space between the two jaws is designed to be easily and rapidly adjusted, to provide I to adapt the several parts to better performa means to make this adjustment rapid and positive, to provide awrench that can be easily operated with one hand, to provide a wrench formed with a movable jaw provided with a pawl designed to engage a series of serrations formed on the shank of the wrench.

Further objects are to'provide ameans whereby the jaws will be tightened together onthe handle being operated, to provide a handle pivotally mounted to the shank of the wrench and to the serrated member slidably mounted thereon in order to tighten the jaws on the operation of the wrench.

. Other. objects are to provide an adjustable wrench that is simple in construction, not

liable to go out of repair, and generally the functions-required of'them.

With the above and other objects in view, the invention consists essentially of the im-: proved construction, hereinafter described in detail in the accompanying. specification and drawings.

In the drawings;

Figure 1 is a side elevation of the improved wrench.

Figure 2 is a side view of the same, partly.

in section and partly, in elevation.

Figure 3 is a perspective view of the pawl member.

Figure 4 is a perspective view of the adjustable jaw.

Figure 5 is a side elevation of an alternative form of wrench.

Figure 6 is a side view of the same, partly in section and partly in elevation.

Figure 7 is a perspective view of the pawl member.

Figure 8 is a perspective View of the slidable aw and extending arm.

Specification of Letters Patent. Patentgd J ly 25 15.}22

Application filed December 10, 1921. Serial No. 521,416.

'Like characters of. reference indicate correspondmg parts in all the figures.

ln the drawings; A represents the improved Wrench comprising a shank 10 at the end of which a stationary jaw 11 is formed integral; The shank 10 is formed with a depressed portion providing a shoulder 12,

which is formed with a recess 13. Slidably mounted on the depressed portion of the means of this connection when the handle 16 is moved inwardly the fulcrum 18 on the shank will act as a'pivot and the handle being pivotally connected to the lug 17 as at 19, the serrated member 14 will be forced to slide on the depressed portion of the shank 10, and the member 14 moving on the same,

the pin 15 will be forced to extend within the recess 13 provided in the shoulder 12.

Slidably mounted on the shank 10 is a movable jaw 20 formed with a serrated working face 21 and provided with a slotted arm or link 22, which engages theshank 10.

The jaw 20 is formed with a rearwardly' extending arm 23 formed with;a pair of shoulders 24, which are apertured in alignment asshown at 25 in order to pivotally en gage a pin 26 on which is mounted a pawl member 27, which is formed with a slotted arm or link 28 designed to engage the shank 1 0 and the serrated member 14.

.The pawl member 27 is formed on one side of its fulcrum with a lip 29, and on the op-' P posite side of its fulcrum with a pointed wedge 30, which is designed to engage the serrations formed on the serrated member 14.

A resilient member preferably a" leaf spring 31 is fastened to the upper face of the arm 23, and the outer end of the spring 31 engages the underface of the lip 29 provided on the pawl 27. vThe working face of the stationary jaw 11 may be concave if desired, and provided with serrations 32.

When in operation, the works are engaged by the jaw 11, and the pawl 27 being forced obliquely upwards the movable jaw 20 is slid on the shank 10 of the wrench, and

brought to bearing engagement with the 7 gagement therewith through its wedge point engaging the serrations and will therefore tighten the grip of the jaws 11' and 20 by lessening the space between the same.

Referring now to Figures 5 to 8 inclusive of the drawings, the shank 33 is formed integral with a handle 34% and the outer end of the shank 33 is also provided witha sup- 7 porting jaw 35 formed integral therewith.

The shank 83 is provided intermediate of its length with serrations 36 andslidably mounted on the shank 33 is a mofvablejaw 37 formed'with a slotted arm or link 38 engaging the shank 33. r

The movable aw 37 is formed wlth an .arin 39 extending rearwardly of the jaw,

and formed at its outer end with a pair of shoulders lO, which are bored in alignment as shown at 41. The bores d1 carry a pin 4L2 on which is pivotally mounted a pawl member 43 provided with a slotted arm or link 4+1; engaging the shank 33.

The pawl member 43 which its similar to that pawl member 2-7 previously described,

is provided with a lip [15 on one side of its fulcrum, and a wedge point 46 on the opposite side thereof.

Fastened to the underface of the arm is a resilient member 47 which is preferably a 1 leai spring, and the end of the leaf spring 47, which is offset as at 48 engages the outer tace of the lip 45 and is'designed to force the pawlmember downwardly, thus causing the wedge point 46 to engage theserr'ations 36. provided on the shank It is obvious that the operation of this alternative form of wrench is'the same as that of the preferred form previously described with the exception that no means are provided to tighten the jaws together, while operating the wrench.

j The movable jaw 37 is moved along t shank 33 by obviously raising the pawl member 4-3 in order to cause the wedge point 16 to disengage from the serrations 36 and be thus free to move along the shank.

As many changes could be made in the above construction, and many apparently widely different embodiments of my invention, within the scope of the claims, constructed without departing from the spirit or scope thereof, it is intended that all matter contained in the accompanying specification and drawings shall be interpreted as illustrative and not in a limiting sense.

Vih at I claim as my invention is: j'

1. An adjustable wrench comprising a shank, formed with a shoulder provided with a recess, a serrated member slidably 'mounted in the shank, and formed with a pin engaging the recess, a handlepivotally attached to one end of the shank, and to the serrated member, a jaw formed integral with the opposite end of the shank, an adjustable jaw slidably mountedon the shank, an arm on the adjustable aw extending along the serrated member, a pawl pivotally mounted on the arm, and formed with a lip on one side of its fulcrum, and a wedge point on the opposite side, a slotted arm carried by thepawl engaging the. shank, and serrated member, and resilient means on the arm designed to force the wedge pointed pawl in engagei'nent with the serrations.

2. The adjustable wrench claimed in claim 1, in which the extending arm is formed with pair of shoulders in which the pawl is fulcrumed.

3. An adjustable wrench comprising a shank, a jaw formed integral with one end "of the shank, an adjustable jaw slidably mounted on the shank, an extension formed integral with the adjustable jaw, a pawl pivotally mounted on the extension, a member slidably mounted on the shank and formed with a serration on its upper face, a slotted arm carried by the pawl designed to engage the shank and the serrated member, and "meansonthe extension to keep the pawl in engagement with the serrations.

In witness whereof I" have hereunto set my hand in the presence of two witnesses.

WILLlAM ALEXANDER MARTIN.

*VVitnesses: 1 3 v K. M. MAR -IN, J. A. WnBs-rm. 

